pmdalio is a Performance Metrics Domain Agent (PMDA) which exports
metric values about the Linux I/O target subsystem, which provides
for protocols like iSCSI, FCP, FCoE. These allow storage available
on one host to be exported and consumed by other hosts using industry
This PMDA exports summary metrics which are performance value
aggregations and configuration per LIO target instance.
Additionally, it provides per LUN performance metrics including IOPS,
and READ and WRITE throughput.
The LIO configuration is maintained within the kernel's configfs
virtual filesystem. The python-rtslib module provides an interface
to configfs, allowing tools like pmdalio to interact with the
settings and metadata held in configfs.
Install the lio PMDA by using the Install script as root:
# cd $PCP_PMDAS_DIR/lio# ./Install
To uninstall, do the following as root:
# cd $PCP_PMDAS_DIR/lio# ./Removepmdalio is launched by pmcd(1) and should never be executed directly.
The Install and Remove scripts notify pmcd(1) when the agent is
installed or removed.
installation script for the pmdalio agent
undo installation script for the pmdalio agent
default log file for error messages from pmdalio
Environment variables with the prefix PCP_ are used to parameterize
the file and directory names used by PCP. On each installation, the
file /etc/pcp.conf contains the local values for these variables.
The $PCP_CONF variable may be used to specify an alternative
configuration file, as described in pcp.conf(5).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
email@example.com. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2020-08-13. (At that time, the date of the most recent commit that
was found in the repository was 2020-08-11.) If you discover any
rendering problems in this HTML version of the page, or you believe
there is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
Performance Co-Pilot PCP PMDALIO(1)